Service difficulty report · Support · Boeing 7377Q8

Difficulty date
June 3, 2022
Submitted
June 30, 2022
Operation
Air carrier
Aircraft
N7850B
Make and model
Boeing 7377Q8
Aircraft serial
28238
Aircraft time
59,194 hours, 39,098 cycles
Part
Support
Condition
Corroded
Location
Fwd Cargo
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

CORROSION ON FWD CARGO BAY FLOOR TO SIDEWALL SUPPORT AT LBL 24 BS 500+10; BS 500A+6; BS 500B+6; BS 500B+18. / [01] VERIFIED APPLICABILITY FOR ALLOWABLE DAMAGE LIMITS OF FCB FLOOR TO SIDEWALL SUPPORT;LBL 24 WL 156 ; IAW SRM 53-00-53-1A-2 ALLOWABLE DAMAGE 2.;[02] FABRICATED REPLACEMENT FLOOR TO SIDEWALL SUPPORT USING BAC1496-444#7075T62 LOT:1485395-1 IAW SRM 51-40-05-0G-0; SRM 51-40-08; SRM 53-00-53-2R-5 SECTION 4.D-H AND DWG 143A7501 ID:0001 REV: B. FABRICATED FLOOR TO SIDEWALL SUPPORT SPLICE REPAIR BS 480+10' USING BAC1496-444#7075T62 LOT:1485395-1 IAW SRM 53-00-53-2R-5 SECTION 4.D-H; SRM 51-40-05. APPLIED CHEMICAL CONVERSION COATING TO SPLICE AND SIDEWALL SUPPORT IAW SOPM 20-41-02. OK APPLIED PRIMER TO SPLICE AND SIDEWALL SUPPORT.;[03] CORRECTIVE ACTION #2:FABRICATED ; LOCATED AND DRILLED REPLACEMENT FLOOR TO SIDEWALL SUPPORT USING BAC1496-444#7075T62 LOT:1485395-1 IAW SRM 51-40-05-0G-0; SRM 51-40-08; SRM 53-00-53-2R-6 AND DWG 143A7501 ID:0001 REV: B. FABRICATED FLOOR TO SIDEWALL SUPPORT SPLICE REPAIR AT B/S 480+10' USING BAC1496-444#7075T62 LOT:1485395-1 IAW SRM 53-00-53-2R-6 AND SRM 51-40-05. APPLIED CHEMICAL CONVERSION COATING TO SPLICE AND SIDEWALL SUPPORT IAW SOPM 20-41-02. OK APPLY PRIMER ON SPLICE AND SIDEWALL SUPPORT.[07] INSTALLED REPAIR SPLICE ON NEW FLOOR TO SIDEWALL SUPPORT LOCATED BTW BS 480 TO 500 LBL 24 WL 156 IAW SRM 51-40-02 AND SRM 53-00-53-2R-6 REPAIR 6;

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